Harrow.



Patented Aug. 22, I899.

M. J: TODD.

NARROW.

(Application filed Apr. 12, 1899.)

2 Sheets$heet I.

(No Model.)

Patent-d Aug. 22, I899.

M. J. TODD.

H A R R O W.

(Application filed Apr. 12, 1899.)

2 Sheets Sheet 2,

(No Model.)

qwihwoam To all hom it may concernr Be itfknown that I, MARQUIS J. TODD-,- of .Buffalo,"in the county of Erie and State offNew York, have invented certainnew and useful Improvements in Harrows; and'I do hereby- ."declare the following to be a full, clear, and exact. description of the invention, such as .NISTED STATES MAR UIS J. TODD,

BUFFALQNEW YORK.

I MA ROW.

SPECIFICATION'forming partofdietters Patent No. 631,598, dated August 22, 1899.

I 4 Application filed April 12, 1899; Serial No. 12,788. (No model.)

willsnable'others skilled inthe art to which ".appertai ns to make and use the same. .-*::'I!h1s mvention, contemplates certain new anduseful improvements in barrows. hf'ThQ primary objects of the invention are to antomaticallyraise the central disk when the disk gangs between which it is located are thrown out of working position, to force and hold the disk down to its work when the disk in line between the two gangs of disks,

gangs are thrown into working position, andto. allow such disk-to yield upon contacting iwitlrstones'or other-='oostructions.:-

fnrtherobject is to maintain the central thereby preventing it from working too near either gang and. avoid strain on its standard, and a further object is to efiect the operation of the central diskthat is, throwing it into and out of engagement with the soil-by the operation of the gang-adjusting mechanism. The disk-carryingstandard is capable of longitudinal movement, and when so moved the disk is either raised or lowered. By connecting the standard to the gang-adjusting lever the central disk is thrown into or out of working position simultaneously with the movement of the gangs. The movements of the standard are slower than those of the gangs.

to the inner ends of the gangs. An adj ustable bell-crank lever connected to the disk bearing maintains the disk in central line between thegangs.

Lilheinxentionwill be hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is .a View in perspective of a harrow with my improvement attached. Figs. -2 and 3 are side views with one of the gangs removed, in

the former the disks being shown in, and in the latter out of, working positions. Fig. 4 shows the disk-holding mechanism. .Fig 5 is a longitudinal sectional view of a portion thereof and hub of disk. Eig 6 is a detail.

granted tome October 9, 1894 Y B is the central disk, which is shown in. Fig. 1 as being of the spade cutting-pattern, although any style disk maybe used. Its axial bearing b has a central longitudinal opening to accommodate an eyebolt b. Through the eye of this bolt is inserted the lower rounded portion b of the disk-carrying standard 0. By' tightening up the nut b the eyebolt will draw the standard into recesses in upper and lower flanges 1), formed with the hearing 1), thereby binding the standard slightly inward, is then bent into an oblique portion d, from the forward end of which the standard is carried forward on an approximately horizontal line beneath the pole a, and

p at its forward end is pivoted to the operating- .lever a, to which are also connected the adjusting-bars 0. The connection of the standard to lever 17. is nearer to the fulcrum of the latter than is the connection of the bars a By operating the lever a the disk-carrying with the shifting of the disk gangs and will be moved slower than the latter. In this way 1 the disk is always kept well up to the inner ends of the gangs without contacting with the p f latter. I In this way the central disk is kept well up.

D is a guide or support for the disk-carrying standard, its function being to hold the disk elevated or depressed, according as the disks are thrown out of or into working-positions. This guide or support is shown as being composed of a bar bolted at its forward the guide keeps the disk down to its work.

When the standard is drawn forward, it ele- Referring to the drawings, A designates ofiare shown as in Letters Patent No. 527,352, g

to the hearing. The standard 0 above the "rounded portion" is carried upward and standard will be adjusted simultaneously portion of the standard, and the pressure of vates, the disk, holding it away from the ground. These results are obtained by the shifting of the disk-carrying standard up and down simultaneous with its longitudinal movement. The bar of which the guide or support is composed is preferably a springbar, and for this purpose it is more or less curved throughout its entire length down to the slotted end portion. Thus a yielding action is obtained and the central cutting-disk is not only held down to its work, but is free to ride upon meeting stones or other obstructions. As the gangs are thrown into a straight line out of their working'positions the central. disk is drawn forward and upward.

E is a bell-crank connection between the central disk and one of the gangs, its purpose being to maintain the diskin central line between the gangs. lt comprises a horizontal arm e, having a vertical portion 6, fitted in eyebolts e of the bearings e of one of the gangs, and a turnbuckle e, pivotally connected to the outer end of arm e and to the bearing 1) of the disk B. The arm c is bent at e", so that it will engage with the rear side of bearings e which acts as a stop to limit the movement of the arm, thereby making a rigid connection with the central disk and also keeping the arm out of contact with the end disk of the gang. The turnbuckle comprises two threaded rods a having eyes a, one to receive the upturned end of arm e and the other a lug e of bearing 7). These eye-rods are held in place by keys c By disengaging the outer end of one of the rods 6 and then turning the latter the connection may be lengthened or shortened. In this way the central disk may always be maintained in proper relation to the ends of the gangs at the different angles to the line of draft and kept up to its work without strain upon its carryingstandard.

In practice the central disk constantly exerts a pull upon the connection with the arm 6, and when the gangs are thrown out of work the central disk is free to move forward without binding.

The advantages of my invention are apparent.

It is obvious that changes may be made in the construction and relative arrangement of parts without departing from the scope of the invention.

I claim as my invention 1. A harrow having gangs, a disk centrally of said gangs; and means for automatically lowering and raising the disk as the barrow is thrown into and out of operation.

2. Inabarrowhavingdiskgangs and means for adjusting the same relatively to the line of draft, a central disk, and means for automatically lowering and raising the disk as the disk gangs are thrown into and out of operation.

In aharrow having disk gangs and means For adjusting the same relatively to the line of draft, a central disk connected to said means whereby the latter will effect the simultaneous adjustmentof the disk and the gangs.

4. In a harrowhavingdisk angs,and means for adjusting the same relatively to the line of draft, a central disk connected to said means, and means for automatically lowering and raising the disk as the disk gangs are thrown in and out of operation.

5. In aharrow having disk gangs,and means for adjusting-the same relatively to the line of draft, a central disk, and means for raising and lowering said disk simultaneously but at a differential movement with the gangadjusting means.

6. In a harrow, the combination with the disk gangs, and the operating-lever therefor, of a central disk and a standard on one end of which said disk is mounted, the other end of the standard. being connected to the lever, substantially as set forth.

7. In a harrow, the combination with the disk gangs, the operating-lever and adj usting means connecting the latter to said gangs, of a central disk, a standard therefor connected to said lever nearer to the fulcrum thereof than the said adjusting means, and means with which said standard is in engagement intermediate its length for raising and lowering the disk as the standard is moved longitudinally, substantially as set forth.

8. In a harrow, the combination with the disk gangs, of aeentral disk, a standard for .said disk, means for moving such standard longitudinally, and a guide or support in engagementwith said standard intermediate of .the disk and the means for moving same whereby as the standard is adjusted the disk will be raised or lowered.

9. In a barrow, the combination with the disk gangs, and the operating-lever therefor, of a central disk, a standard for said disk connected to said operating-lever, anda guide with which said standard engages, substantially as set forth.

10. In adisk barrow, acentral independent disk, a standard therefor having an oblique portion, means for moving such standard lougitudinally, and a guide with which the oblique portion of said standard engages, substantially as set forth.

11. In adisk harrow, a central independent disk, a standard therefor having an oblique portion, means for moving such standard longitudinally, and a bar having a slot therein in which the oblique portion of said standard is designed to work, substantially as set forth.

1?. In a disk barrow, a central independent disk, at standard therefor having an oblique portion, an operating-lever to which such standard is connected, and a bar having a slot in which said oblique portion is designed to work, substantially as set forth.

13. In a barrow having disk gangs, and an operating-lever therefor, a central disk, a standard therefor having an oblique portion and connected at one end to said lever, and

a bar having a slot in which said oblique portion is designed to work, substantially as set forth.

14.. A disk harrow having a central independent disk, a standard therefor, and yielding means for depressing said disk.

15. A disk harrow havinga central independent disk, a standard therefor, and a spring-bar with which said standard engages, substantially as set forth.

' 16. A disk harrow having a central independent disk, a pivoted support therefo r, and a spring exerting a downward pressurezon said disk, substantially as set forth.

I 17. In adisk harrow, a central independent disk, a support therefor, means for moving such support, and a guide -with whiclnsucli' support is in constant engagement, the latter being such that a wedge-like action is exerted on said support to depress or raise said disk during the adjustment of the support, substantially as set forth.

18. 'lhe'combination with the disk gangs, of the centraldisk, the standardtherefor having an oblique portion, aspringbar having a slotin which said oblique portion is designed to work, and a lever for moving said standard back and forth, substantially as set forth.

19. The combination with the frame, the disk gangs, and the operatinglever therefor, of the central disk, the standard therefor connected to said lever and having an oblique p rtion, and the bar secured to said frame and extended pver said standard and having an angular end formed with a slot in which said oblique portion is designed to work, substantially as set forth.

20. In a harrow having disk gangs, a central disk, a bearing therefor, an adjustable connection between said bearing and one of the disk gangs and a stop to limit the move- ;ment of such connection.

21. In a harrow having disk gangs, a central disk, a bearing therefor, a compensating connection between said disk and one of the gangs and a stop to limit the movement of such connection.

22. In a harrow having disk gangs, a central disk, a bearing therefor, an arm loosely secured at one end to one of the gangs, a stop to liinit the movement of the arm and an adjustable connection between such arm and the central disk, substantially as set forth.

23. In a harrow having disk gangs, a central disk, a bearing therefor, an arm secured at one end to one of said gangs, and a turn-.

buckle connecting the other end of said arm to said bearing, substantially as set forth.

24. In a disk harrow having an operatinglever, a standard connected at one end to said lever and having a rounded portion, a central disk, a bearing therefor having upper and lower recessed flanges, and an eyebolt designed to engage and hold said rounded portion in the recesses of said. flanges, substantially as set forth.

25. In a harrow having disk gangs and a central disk, a standard therefor operated by the adjustment of the gangs, and an engaging device for forcing the disk downward when the standard is moved in one direction and. raising it when the standard is moved in the opposite direction.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

MARQUIS J. TODD. Witnesses:

C. M. Gunmen,

J. II. RmNNoGEL. 

